ASTM A269 TP316H Stainless Steel Tubes (UNS S31609)
ASTM A269 TP316H is a high-temperature variant of 316 stainless steel, specially developed with higher carbon content for improved high-temperature strength and creep resistance. These tubes offer exceptional corrosion resistance, durability, and heat stability, making them widely used in chemical processing, refineries, high-temperature services, and heat exchangers.
Designed for seamless and welded austenitic stainless steel tubing, TP316H provides superior performance in elevated temperature environments while maintaining excellent weldability and oxidation resistance.
Key Features
- Enhanced High-Temperature Strength due to higher carbon content.
- Excellent Corrosion Resistance against acids, chlorides, and harsh industrial environments.
- Superior Oxidation & Creep Resistance, ideal for elevated temperature operations.
- Reliable Weldability & Fabrication, suitable for complex processing systems.
- Smooth Surface Finish for sanitary applications and efficient fluid flow.
- Compliance with ASTM A269, ensuring consistent quality and mechanical integrity.
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM / ASME | 316H / UNS S31609 |
| EN / DIN | X5CrNiMo17-12-2 (approx. equivalent for 316, but 316H has higher carbon) |
| JIS | SUS316H |
| BS | 316S51 |
Available Sizes
- Outside Diameter (OD): 6 mm to 101.6 mm
- Wall Thickness: 0.5 mm to 8 mm
- Length: Up to 6 meters (custom lengths available)
- Custom sizes available upon request.
ASTM A269 TP316H Chemical Composition (UNS S31609)
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
ASTM A269 TP316H Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Proof) | ≥ 205 MPa |
| Elongation | ≥ 35% |
| Hardness (Rockwell B) | ≤ 90 HRB |
ASTM A269 TP316H Physical Properties
| Property | Value |
|---|---|
| Density | 8.00 g/cm³ |
| Melting Range | 1370 – 1400°C |
| Thermal Conductivity | 16.3 W/m·K at 100°C |
| Electrical Resistivity | 0.75 µΩ·m |
| Modulus of Elasticity | 193 GPa |
| Specific Heat | 500 J/kg·K |
Types of ASTM A269 TP316H Tubes
- Seamless Tubes
- Welded Tubes
- Cold Drawn Tubes
- Heat Exchanger Tubes
- Instrumentation Tubes
- Polished / Decorative Tubes
- U-Tubes
Applications
- Petrochemical & Refinery Plants
- High-Temperature Heat Exchangers
- Chemical Processing Equipment
- Boiler & Superheater Tubes
- Pharmaceutical & Food Processing Systems
- Oil & Gas Processing Lines
- Pressure Vessels & Piping Systems
- Power Generation Plants
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